A co worker told me I am not going to Heaven due to the fact the Lord had already assembled the 144,000 gentiles that would be going to Heaven and she was one of them. I to this day don’t understand how she could say that to me when I feel in my heart I am saved and have asked the Lord cleanse me of all the sins of my life.
Your friend is a Jehovah’s Witness. Their view of the End Times conflicts with orthodox Christianity and can’t be supported by the Bible. The 144,000 people she mentioned are found in Revelation 7:4-8 where they’re clearly identified as Jews from the 12 Tribes of Israel, not Gentiles.
If you believe that Jesus died for your sins and rose again, and if you’ve asked Him to save you from your sins, then you’re going to Heaven.
For God so loved the world that He gave His only begotten son that whosoever believes in Him will not perish but have eternal life (John 3:16)